Network · AS5578

AS5578 SWAN, a.s.

AS5578 (SWAN, a.s.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS5578

  • OwnerSWAN, a.s.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses314,112
  • IPv4 ranges116
  • IPv6 ranges20
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 83.168.128.0/18
  • 62.197.192.0/18
  • 62.168.64.0/18
  • 195.168.128.0/18
  • 195.168.0.0/18
  • 85.248.192.0/19
  • 85.248.160.0/19
  • 84.245.96.0/19
  • 62.65.160.0/19
  • 62.152.224.0/19
  • 217.75.64.0/19
  • 212.26.160.0/19

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-21.

Check an IP address →

Detect it in code

Spot AS5578 traffic at signup.

Send the visitor's IP. The response includes the ASN, the owner and flags.hosting.

curl https://veqen-app.com/v1/ip/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.7"}'
import os, requests

r = requests.post(
    "https://veqen-app.com/v1/ip/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"ip": "203.0.113.7"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])
const res = await fetch("https://veqen-app.com/v1/ip/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip": "203.0.113.7"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);
Questions

About AS5578

Is AS5578 a datacenter or VPN network?

AS5578 (SWAN, a.s.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS5578?

AS5578 is registered to SWAN, a.s.. It announces about 314,112 IPv4 addresses.

How do I detect traffic from AS5578?

Call the Veqen IP check with the visitor's address. The response includes the ASN, the owner and whether the network is a datacenter, VPN network, relay or ISP.